Eli Whitney Invents the Cotton Gin - PowerPoint PPT Presentation

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Eli Whitney Invents the Cotton Gin

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Tobacco prices were low, and rice and indigo prices weren't much better. ... A small gin could be hand-cranked; larger versions could be harnessed to a horse ... – PowerPoint PPT presentation

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Title: Eli Whitney Invents the Cotton Gin


1
Eli Whitney Invents the Cotton Gin
2
  • Eli Whitney, a young man from Massachusetts,
    listened politely to the Georgia planters
    complaints. Tobacco prices were low, and rice and
    indigo prices werent much better.

3
  • Cotton grew well, but cleaning the seeds out of
    cotton fibers was a big problem.

4
  • A slave picking out seeds by hand could clean
    only a few pounds a day. At that rate, even using
    cheap slave labor, there was no profit in raising
    cotton.

5
  • Unless something changed, the future of farming
    in the South looked bleak.

6
  • As the planter talked, a solution to their
    problem began to take shape in Whitney's head.

7
  • Within months he had created the cotton gin, an
    invention that allowed raw cotton to pass through
    narrow slits in a piece of wood, pulling the
    cotton fibers through but leaving the seeds
    behind.

8
  • A small gin could be hand-cranked larger
    versions could be harnessed to a horse or driven
    by water power.

9
  • "One man and a horse will do more than fifty men
    with the old machines," wrote Whitney to his
    father. . . . "Tis generally said by those who
    know anything about it, that I shall make a
    fortune by it."

10
American Cotton Production
  • Thanks to his invention, cotton production in the
    U.S. skyrocketed from 1.5 million pounds in 1790
    to 85 million pounds in 1810.

11
  • But in the end, Whitney made virtually nothing
    from his invention. Others copied his invention
    and he was left virtually penniless.

12
Cotton Gin
13
(No Transcript)
14
Eli Whitney and Interchangeable Parts
15
  • In 1804, Whitney left the South forever,
    disappointed and disgusted. In his words, "An
    invention can be so valuable as to be worthless
    to the inventor."

16
  • But after settling in New Haven, Connecticut,
    Whitney settled on an idea that would be as
    valuable to the North as his cotton gin was to
    the South.

17
  • In 1798, the federal government awarded Eli
    Whitney a contract of 134,000 to produce and
    deliver 10,000 muskets.

18
  • Until then, every rifle had been made by hand
    from stock to barrel but the parts of one gun
    did not fit any other gun, nor did anyone expect
    them to.

19
  • It was Whitney's idea to use machines that would
    make all the parts of his rifles so nearly
    identical that the machines parts could be
    interchangeable from one gun to another.

20
  • This system of manufacturing would permit an
    unskilled man to turn out a product that would be
    just as good as one made by a highly trained
    machinist.

21
  • Whitneys idea caught on all over America.
  • By 1850, English visitors back from America
    described what they now called the American
    System of Manufacture.
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